本文介绍了在“for"循环中访问索引?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
How do I access the index in a for loop like the following?
ints = [8, 23, 45, 12, 78]
for i in ints:
print('item #{} = {}'.format(???, i))
I want to get this output:
item #1 = 8
item #2 = 23
item #3 = 45
item #4 = 12
item #5 = 78
When I loop through it using a for loop, how do I access the loop index, from 1 to 5 in this case?
解决方案
Using an additional state variable, such as an index variable (which you would normally use in languages such as C or PHP), is considered non-pythonic.
The better option is to use the built-in function enumerate(), available in both Python 2 and 3:
for idx, val in enumerate(ints):
print(idx, val)
Check out PEP 279 for more.
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